"I've spent the last 13 years sleeping on the corner of the bed while our Staffy sprawls out all over the bed," commented one user.

Many people have owned or known big dogs, from the gentle giant Great Danes to the sweet-tempered, bear-sized Newfoundlands.

These dogs were bred to guard estates and are naturally protective of their territory and family. Their size alone can make them potentially dangerous. A full-grown Bullmastiff can weigh up to 130 ...

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